Hacksaw-machine.



No. 672,802. Patented Apr.23, I90L. L. H. OLMSTED.

HACKSAW MACHINE.

(Application filed Jan. 14, 1901.) (No Model.)

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No. 672,802. Patented Apr. 23, I901. L. H. DLMSTED.

HACKSAW MACHINE.

(Application filed Jan. 14, 1901.! (No Model.) 2 Sheets-Sheet 2.

THE Norms FETERS o0, mowumm wAswwmow B c UNITED STATES ATENT FFICE.

LEVERETT H. OLMSTED, OF HACKENSACK, NEW JERSEY.

HACKSAVY-MACHIN E.

SPECIFICATION forming part of Letters Patent No. 672,802, dated April23, 1901.

' Application filed January 14, 1901. Serial No. 43,128. (No model.)

To (ZZZ whom it may concern:

Be it known that I, LEVERETT H. OLMSTED, a citizen of the United States,residing at Hackensack, in the county of Bergen, in the 'State of NewJersey, have invented a certain new and Improved Hacksaw -Machine, ofwhich the following is a specification.

My invention relates to improvements in hacksaw-machines in which ahacksaw is secured to a frame to which is given a horizontalreciprocating motion by means of a reing the saw to and from the work,insure a true vertical cut through the work, and provide a swiveled visefor holding work with a pointer or indicator to move along a segmentmarked to indicate various angles, and provide a counterbalance to thesaw-frame and its attachments to be used when sawing softm etal pipe andthe like, in which the saw may feed down too rapidly.

The accompanying drawings form a part of this specification andrepresent what I consider the best means of carrying out the invention.

Figure l is a rear elevation. Fig. 2 is an end View seen from the rightin Fig. 1. Fig. 3 is a plan view. Fig. 4 is a front view of a portion.Fig. 5 is a front elevation of a portion on a larger scale. Fig. 6 is acorresponding side elevation seen from the left in Fig.

5. Fig. 7 is a side View corresponding to a portion of Fig. 4:, showinga modification.

Similar letters of reference indicate like parts in all the figureswhere they appear.

A is a foundation piece or bed of cast-iron or other suitable materialmounted on legs of convenient height, the upper portions of which areshown in Figs. 1 and 2.

A is a stout pedestal fixed on A and equipped to form a bearing for ashaft B, on which is fixed a crank B, carrying a crankpin B which latteracts through a connecting-rod O on a bearing D, which extends at rightangles from a sliding head D, running on a horizontal slideway A firmlysupported on a fixed post A A pulley E, turning constantly by a belt(not shown) from any suitable power, revolves or releases the shaft B,controlled by a clutch F, operated by a handlever G, acting through alink G, which is bent at the end to engage in the groove e in the hub ofthe pulley E. The link is formed with two vertical notches g g, in whichengages a spring A, fixed on the stationary pedestal A and serving tohold the lever G and the connected clutch in or out of engagement untilit shall be strongly operated by the hand.

A is a smoothly-finished cylindrical post set in the bed A. On its upperend is fixed a boss having longitudinally-extending arms A A In thefront arm A is pivoted a lever H, carrying an adjustable weight I,secured by a pinching-screw I. A link J is pivoted to this lever andextends downward. This link connects to a horizontal arm K on a stoutsleeve K, which latter embraces and is self-adjusting up and down on thecylindrical post A. The arm is firmly secured by screws to a horizontalslideway K the rear end of which is steadied by a post A which itpartially embraces by means of a bracket K M is a reciprocating framecarrying the saw P and receiving motion through an extension of thebearing D into a deep vertical groove m, so that it is reciprocated thesame whether it is in a high or low position. This carrier M is guidedon the slideway K, partially embracing it by the aid of narrow plates KA spring-catch K extending upward from the arm K, engages automaticallyover the arm A when this frame is lifted and holds it in its highestposition. The saw is engaged by means of slightlyhooking pins set inflat faces near the plane of the axis of the cylindrical pieces. Thecylindrical piece U at the right hand is held by a transverse pin U. Thecylindrical piece V at the left side is held adjustably by a thumb-nutZ. Resistance to its rotation is obtained through an arm V, engagingwith two pins M M in the frame M. The saw is further held in therequired plane at the working point by the aid of a guide L, having anarrow slot Z, receiving the saw-blade and allowing it to play throughit in an obvious manner. This guide is received in a block N, which isadjustable laterally by turning on a pivot-screw X, set in a block Y,which'latter is capable of turning and also of being shifted bodily tothe right and left on a horizontal pin K set in the sleeve K. Theadjustment of the block Y on the pin K is secured by a pinching-screw Y.The adjustment of the block N at any required angle is secured bytightening the pivot-screw X. The guide L may be adjusted in itsclose-fitting hole in the block N, either up and down or by partiallyrevolving it, af-

The adjustment of the block N on its pivot-- pin X allows the changingof the inclination of the saw. This willtusually be only to very smallextents, sufiicient to attain absolute truth in sawing through a thickpiece of metal. The adjustment on the pin K allows the position of theguide-block L to bechanged bodily to the right or left. The partialturning on the pin K allows the guide L to be adjusted to the right orleft, so as to be always close to the piece to be cut without contactwith it.

The piece to be sawed is shown as a cylindrical bar,which may be of softsteel and is indicated in dotted lines Q in Figs. 1 and 2. It isfirmlyconfined in a-holder R, which is pivoted to the bed A by an adjustablescrew .8 and is firmly clamped between an upright face R and a slidingjaw T, which latter is operated by a screw W. For square cuts the holderR is set exactly longitudinal to the bed; but to adjust for variousangles the pivot-screw S is slackened and the holder R is partiallyrevolved thereon and the screw is again tightened. A raised are A1 isformed just in rear of the holder R, the upper face of which isgraduated and the inner face-that toward the holder R-receives aspring-index R which aids in determining the angle.

The revolutions of the shaft B give a uniform reciprocating motion tothe saw. The weight of the carriage M and its attachments and also thedownward force transmitted through the link J from the loaded lever Hurge the saw down to its work. For sawing small pieces the weight I maybe set inwardto the right in Figs. 1 and 3so as to reduce be augmentedor diminished.

shown in dotted lines in Fig. 1.) Such lever H is pivoted on a boss onthe rear face of the arm A and connected by the aid of the link J to alug on the sleeve K. These parts may be permanently attached to themachine, if preferred, the weight I being transferred from the lever Hto the lever H, according as the downward pressure on the saw isrequired to I prefer to remove the lever H and .the link J when they arenotrequired.

It will be understood that whenever the weight of the saw and theconnected parts presses down with too much force on the work I take theweight I off from the lever H and apply it on the lever H, securing itin such position as will give the required amount of force to partiallybalance the saw and its connections.

Modifications may be made withoutdeparting from the principle orsacrificing the advantages of the invention. The inner face of the are Amay have V-shaped notches to receiye the corresponding wedge-shaped endof the lip on the spring R and aid the eye in setting the work forcertain angles. It may be specially desirable to providesuch a notch atthe required point to aid in setting the holder for cutting squarelyacross a straightfaced piece.

Parts of the invention can be used without others. I can omit thesteadying-post A and support the slideway K and its attachments entirelyon the main post A The thickness and curvature of the connecting-rod Cmay be varied. It is only important that it shall communicate the motionproperly and avoid hitting the work under all conditions.

Fig.. 7 shows a modification of the provisions for maintaining the sawin the vertical plane. In this modification, as in the form shown inFig. 4:, there is an upright arm V, set in the cylinder V; but in thisform, instead of holding it between two pins M 'and M ,.the armextendssmoothly through an upright hole in the head 0 of a pin 0, whichpin is allowed to play smoothly throughzacorresponding hole bored inthesaw-frame.

In applying the parts together with either form of the invention thecylinder Vis inserted from the right, as shown in. Fig. 7, and the pin 0being inserted in the hole for its reception the parts are moved easilyinto position, and after the saw is engaged the nut Z istightened,'drawing it to the proper tension. In this movement the, pin 00' moves easily in the hole for its reception. Either form of theinvention holds the saw upright satisfactorily.

In the provisions for steadying theslide-- way the post A may be groovedand the end of the slideway K made to enter the groove, or the end ofthe slideway K may be enlarged and a hole made through it for the post Ato .pass through, or two posts may be placed a sufficientdistance apartfor the end of the slideway K to work freely between them.

I claim as my invention- 1. As an improvement in hacksawmachines, thesaw-frame guided on a self-adjusting slideway K and having a verticalgroove m, in combination with a sliding head D, having an extension Dperforming the double function of receiving motion from theconnecting-rod O and transmitting it directly to the saw-frame in allpositions, all substantially as herein specified.

2. As an improvement in hacksaw machines, the firmly-supported main postA the sleeve K carrying the slideway K the link J and lever H combinedand arranged to serve substantially as herein specified.

3. As an improvement in hacksawmachines, the firmly-supported main postA the sleeve K carrying the slideway K the second post A engaged withthe slideway through a bracket or fork K and the link J, and lover Hcombined and arranged to serve substantially as herein specified.

4. As an improvement in hacksaw machines having the reciprocatingsaw-frame M, bed-piece A, pedestal A, shaft B, crank B and the swivelingholder R R T and operating means W, in combination with each other andwith the index R and graduated arc A all arranged for joint operationsubstantially as herein specified.

5. In a hacksaw-machine having the reciprocating saw-frame M with thesaw P adjustable in the latter, the rising and sinking sleeve K andslideway K in combination with the guide L, l, embracing the saw andwith the block N, screw N, pivot X, block Y and screw Z, arranged forjoint operation substantially as herein specified.

6. In a hacksaw-machine having a reciprocating saw-frame and adjustablesaw-holder in combination with the upright arm V, cylinder V, andsupporting means M M for holding such arm upright and allowing it tomove longitudinally of the frame, arranged to serve substantially asherein specified.

7. In a hacksaW-machine having a reciprocating saw-frame in combinationwith the arm A, lever H, link J and sleeve K, all arranged to servesubstantially as herein specifled.

8. In a hacksaw-machine having a reciprocating saw-frame, a pedestal A,a founda tion piece or bed A and shaft B, in combination with thegrooved hub-pulley E, notched link G g g, hand-lever G and spring A*,substantially as herein specified.

9. As an improvement in sawing-machines a saw-frame having horizontaland vertical movement, a vertical groove therein and means freelyengaging said groove and connecting the frame to the actuatingmechanism, whereby the frame may be operated at any level as set forth.

In testimony that I claim the invention above set forth I affix mysignature in presence of two witnesses.

- LEVERETT H. OLMS'lED.

Witnesses:

M. F. BOYLE,

J. B. CLAUTICE.

